Sprocket-wheel.



P. J. OAKES.

SPROGKET WHEEL.

APPLIOATION FILED JAN. 31, 190s.

905,744, Pantednea 1,1908' Egal. y .H l

FRANK J. OAKES, OF CHICAGO, ILLINOIS, ASSIGNO TO LINK-BELT COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

' sPnocimT-WHEEL.

specific-anon of VLetter... Patent.

Patented Dec. 1, 1908.

Application filed January 31, 1908. Serial No. 418,675.

.the following is a s eciication.

My invention re ates t'o certain improvements in sprocket wheels used in connection with drive chains having teeth which engage the teeth of thes'procket wheel.

he objectof my invention is to dispense with the use of side flanges used in this ty e. of wheeland to provide means for ho ding' the chain from moving laterally.

My invention is especially applicable to the driven wheel of a chain drive, but it may be applied to both wheels without departing from my invention.

In the accompan ing drawings Figure 1, is a ,side'view o a sprocket wheel illustrating my invention; Flg. 2, is an' enlar ed sectional view on the line 2 2, Fig. 3; 3, 1s an enlarged face. View of part of the wheel; Fig. 4, is a -sectional view on the linet 4-4, Fig. 3, showing the chain in position; and F1 5, 1s a transverse sectional-view of armodi cation Qof my invention.

Ais a sprocketA :wheel having teeth (i 4s aced a given distance apart. Ada ted to links,.

t is 'wheel is a chain B, made up o having teeth b which extend into the throats between the teeth of the sprocket wheel and bear u on they sides of the teeth.o f the sprock t wheel, as clearly shown in Fig. 4. ain

This is a well known form of sprocket c driving gear.

Means must be provided to prevent the chain moving. laterally on the wheels and the common method is to provide ilanges at ea 1de particularly on the driven wheel, and in some instances the driving wheel may be prov1ded with anges although the chain being held in position byl the llange of the driven wheel retains its position on the driving wheel. But this `form of wheelis objectio'nable and 4I provide a rib C which ro- ,v jects from the rim a of the wheel and into the throats between the teeth of the sprocket 'wheel,4 Theteeth of the 50 'chain which would .ordinarily come inline with this rib are .omitted Iand blaiik links b are substituted for the toothed links. This rib in the resent instance is made by slotting the w eel,

as at d, the slot cuttin through the teeth a and into the rim a o the wheel, as shown clearlyin Fig. 2. Then a band of steel is driven into. the slot encircling the wheel, as clearly shown in Fig.- 1. The band C `has a driven fit in the rim of the wheel and in order to insure the band remaining in position I preferably swage the band as at c,

at the points where the band cuts through the teeth so'as to wedge the band-tightly in the space at the' teeth.

While I preferably make the band in one piece, it may be made in as `many sections asv desired, depending upon the size and characterfof the wheel. v

In Fig. 1, I have shown the rib laced in the center of the wheel, while in ig. 5, I

-have shown two ribs c2 placed one on each side ofthe center. Any number of ribs may be used according to the width of the wheel. Thus it will be seen that the chain has a recess on its under side formed by the blank links b', b', and that the chain while being l perfectly free to travel vwill be. prevente from moving laterally to any appreciable extent by means of the rib.`

` I"claim:- p

1. A sprocket wheel having through theteeth into its rim, with a ban mounted in the slot and extending into .the throats between the teeth, but not extending teeth thereon 'and having an annular slot' extendin to theends of the teeth, whereby a toothed chain can mesh with the teeth and will be held laterally on the wheel by the band.

2. The coipination of a sprocketawheel having a rib `rejecting into the throats betweeny the tee h and not extendi to the ends of the teeth, with a toothed drive chain extending over the teeth, the` teeth of said drive chain extending intothe'throats between the teeth, said drive chain ,A having blank links in line with the rib so that the rib extends into the groove thus formed retaining the chain laterally on the wheel.

3. The combination of a sprocket wheel having teeth, a rib projecting. from the riml of the sprocket wheel 'and .into-the throats Vbetween the teeth, with a chain made up of a. series of pivoted links, each link having In testixilony whereof, I have Signed my projecting teeth t thepivot points so as to name to this specification, in the presence of extend into the throats between the teeth and two subscribing witnesses. Q having af series of links without teeth 'in line 'Y FRANK J. OAKES.

5 with the annular rib forming an endless Witnesses: groove in the chain for the reception of the A. E. MANNING, rib on the wheel. E. G. Ewm. 

